Phonograph record



May 22, i923. ,455,886

We H. ROSE PHONOGRAPH RECORD Filed April 16, 1920 Patented bday 22, i923.

hdd?? WILLIAM H. BOSE, F JERSEY CITY, NEW JERSEY, ASSIGNOR OF ONE-HALF HOWARD S. NEIIIIN, 0F.' NEW YORK, N. Y.

PHONOGRAPH R/ECORD.

appncauon mea april vit, 1920. serial no. 374,257.

To all whom 'it may concern:

Be it known that l, WILLIAM H. Rose, a citizen of the United States, residing in J ersey City, county of Hudson, and State or i N Jersey, have invented certain new and n ueful improvements inllhonograph Recmords, of which the following is a full, clear,

and exact speciiic'ation.

My invention relates to phonographic records and 'refers particularly to 'records lmown commercially as disc records.

The ordinary disc record comprises a iat disc carrying sound wave impressions capable of being converted into sound waves by means of the usually employed sound pro` ducing mechanisms of a phonograph.

The practical methods of producing, dul .plicating and using the disc records necessitate a limitation to their size, usually to 12 inches in diameter, and es the period ci time required for thesound reproduction of a record is governed by the length of the sound wave recording groove, it is evident that the duration of a reproduction from the present lmown records is limited to the length of a sound record capable of being impressed upon a hat surface of the arcani the record. A

Ther-care certain physical reasons necessitating a blank, or un-recording surface, upon portions o the record, thus causing a further limitation to the record area capableof'sound reproduction.

The standard phonographs are so constructed that imperfect, or no, sound reproductions can be obtained from a record havin a diameter of greater than 12 inches.

he device of my invention allowsa very considerably longer sound. reproduction with rcard to a time period, than canbe' from a ilat disc record of the same which similar parts are designated by similar numerals Figure l represents a top plan View oi" one formoi a device of my invention.

Figure 2 represents a section through the line 2--2 of Figure 1.

Figure 3 is an enlarged fragmentary detail section of the reco-rd showing the sound wave impressions.

The particular form of my device, shown in the accompanying drawings, comprises adisc 10, having a central opening, or hole, 11, into which a pin oi a revoluble phonograph table may be inserted in the ordina-ry manner to retain the disc in position upon the table. A portion oi the disc 10 carries a series of concentric undulations 12, 12, thus giving that portion of the surface of the disc l0 an undulated, or waved, eii'ect. The outer portion 13 of the disc 10 may be at las indicated. The, disc 10 carries an outer annular iiange member 14. A surface of the disc 10 has a groove 15, carrying sound wave impressions capable of conversion into sound waves in the ordinary manner by means of fa phonograph. rl`his groove is spiral in formation, may be of the desired length for sound reproduction and may be upon either or both/sides of the disc.

lt is evident that the lengthl ofA a sound wave impression groove, capable of being c-arried by `an undulated disc, is greaterv than that capable of being carried by a flat ,l

disc of the same diameter, on account of the greater surface area of the former.

The use of my device, therefore, enables the production of a much longer sound record upon a disc of given diameter than can be obtained otherwise, and hence, the effective capacity of the standard phonograph is materially increased. l

I'donot limit myself tothe particular size, shape, number or arrangcmentof parts as shown and described, all of which may be varied without going beyond the' scope of. my invention as shown, described and claimed. Y What l claim is 1. A single continuous disc phonograph record having a seriesof concentric undulations carrying sound Wave impressions capable of reproduction into sound waves.

2. A single continuous disc phonograph' .A

Q mames@ Y record having a series of concentric undulations Within which is a continuous spiral undulating groove carrying sound Wave impressions therein capable of reproduction 5 into sound Waves.

3. A phonograph record having a series of uniform concentric undulations carrying WLLIAM H. ROSE.

sound Wave impressions capable of reproduction into sound Waves.

Signed at New York city, in the county l" of New York and State of New York this 14th day of April, 1920. 

